R. Kuntz*, E. K. Paik**, M. Tsukada*, T. Ernst*, K. Mitsuya*
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R. Kuntz*, E. K. Paik**, M. Tsukada*, T. Ernst*, K. Mitsuya* *WIDE at Keio University PowerPoint PPT Presentation


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R. Kuntz*, E. K. Paik**, M. Tsukada*, T. Ernst*, K. Mitsuya* *WIDE at Keio University **Seoul National University Aug. 2, 2004, San Diego, 60 th IETF NEMO WG http://www.nautilus6.org.

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R. Kuntz*, E. K. Paik**, M. Tsukada*, T. Ernst*, K. Mitsuya* *WIDE at Keio University

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R kuntz e k paik m tsukada t ernst k mitsuya wide at keio university

R. Kuntz*, E. K. Paik**, M. Tsukada*, T. Ernst*, K. Mitsuya*

*WIDE at Keio University

**Seoul National University

Aug. 2, 2004, San Diego, 60th IETF NEMO WG

http://www.nautilus6.org

Evaluating Multiple Mobile Routers and Multiple Prefixes in NEMO Basic Supportdraft-kuntz-nemo-multihoming-test-00.txt


Overview

Overview

Motivations

Investigate issues with Multiple Mobile Routers and Multiple NEMO-Prefixes

Based on draft-ietf-nemo-multihoming-issues-00.txt

Environment

Operating System: NetBSD 1.6.1

Nautilus6 NEMO Basic Support implementation based on KAME stack


Implementation status

Implementation Status

  • Need multiple CoA registrations to test (1,*,*)

    • NEMO Basic Support issue

  • Need multiple prefix registrations in a single BU message to test (1,*,n)

    • implementation issue.


Topology case 2mrs 1ha 1prefix and 2mrs 1ha 2prefixes

CN

CN

AR

AR

p1

Internet

p1

Internet

AR

CoA1

AR

MR1

CoA1

MR1

HA

HA

LFN

LFN

AR

CoA2

CoA2

MR2

MR2

Home

Network

Home

Network

P1/2

P1/2

Topology: Case (2MRs,1HA,1prefix) and (2MRs,1HA,2prefixes)

Both MR in foreign network

One MR at home


Issues

Issues

  • Unreachability

    • Binding de-registration delay

    • Switching delay from an MR to another MR

  • Routing Loop

    • When failed MR’s binding lifetime expires

      • No BU entry in HA

      • No routing information for NEMO-prefix in HA routing table

  • Asymmetric Communication

    • Incoming traffic by MR1 and outgoing by MR2


Requirements

Requirements

MNN’s quick switching of Default MR

When default MR’s egress interface fails

When incoming and outgoing traffic is asymmetric

Quick de-registration of MR

When it fails

When there is another MR at home

HA’s ability of choosing an MR at Home

Prefix BU for any failed MR

Cooperation between MRs

Dynamically activating/deactivating RA on MR


Conclusion

Conclusion

  • Mobile network reachability depends on

    • MR’s operation

    • MRs’ cooperation

    • HA’s routing table and binding cache

    • MNN’s default router

      http://www.nautilus6.org


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